package thread;

/**
 * 死锁
 */
public class SyncDemo6 {
    private static Object chopsticks = new Object();//筷子
    private static Object spoon = new Object();//勺

    public static void main(String[] args) {
        //北方人
        Thread np = new Thread() {
            public void run() {
                System.out.println("北方人开始用餐...");
                System.out.println("北方人去拿筷子...");
                synchronized (chopsticks) {
                    try {
                        Thread.sleep(5000);
                    } catch (InterruptedException e) {
                    }
                    System.out.println("北方人吃完了饭");
                    System.out.println("北方人去拿勺...");
                }
                synchronized (spoon) {
                    System.out.println("北方人拿起了勺开始喝汤...");
                    try {
                        Thread.sleep(5000);
                    } catch (InterruptedException e) {
                    }
                    System.out.println("北方人喝完了汤");
                }
                System.out.println("北方人放下了勺");

                System.out.println("北方人放下了筷子");
                System.out.println("北方人用餐完毕");
            }
        };

        //南方人
        Thread sp = new Thread() {
            public void run() {
                System.out.println("南方人开始用餐...");
                System.out.println("南方人去拿勺...");
                synchronized (spoon) {
                    try {
                        Thread.sleep(5000);
                    } catch (InterruptedException e) {
                    }
                    System.out.println("南方人喝完了汤");
                    System.out.println("南方人去拿筷子...");
                }
                synchronized (chopsticks) {
                    System.out.println("南方人拿起了筷子开始吃饭...");
                    try {
                        Thread.sleep(5000);
                    } catch (InterruptedException e) {
                    }
                    System.out.println("南方人吃完了饭");
                }
                System.out.println("南方人放下了筷子");

                System.out.println("南方人放下了勺");
                System.out.println("南方人用餐完毕");
            }
        };
        np.start();
        sp.start();
    }
}
